New Demos
1 - Circuit Puzzle
This is a circuit that looks very much like the canonical series circuit, but the switches and lights don't do what is expected.
What components can be added to this circuit to give the observed behavior? One could think about the effects of common components such as resistors, inductors, capacitors, diodes, transistors, etc. It doesn't involve magnets or radio frequency transmitters.
Solution: Diodes provide coding and decoding by phase of the AC current. A diode is put in parallel with the each switch and light.
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W.8(4) - Doppler Rocket
The Doppler Rocket emits a sinusoidal sound waveform at a constant frequency of approximately 620 Hz. As the rocket passes the students, they hear a noticeable shift in frequency.
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This demonstration uses a Laser Ray Box (Wavelength - 635 nm) that project 5 parallel laser beams onto various flat surfaces. It contains a five 1 mW diode lasers. The optic set includes six magnetically-backed templates.
- Model of the human eye
- Camera
- Telescope
- Spherical Aberration
- Reflection and Refraction
Accessories include concave and convex lenses, prisms, mirrors and geometrical figures. They average 5 cm thick and 20 cm high, being highly visible for the whole class. All accessories are attached to the board using magnetic handles. This apparatus can be used to demonstrate index of refraction variations, total internal reflection, parallel deviation, prism behavior, etc.
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O.1(1) - Ray Optics Laser System
This demonstration uses a Laser Ray Box (Wavelength - 635 nm) that project 5 parallel laser beams onto various flat surfaces. It contains a five 1 mW diode lasers. The optic set includes six magnetically-backed templates.
- Model of the human eye
- Camera
- Telescope
- Spherical Aberration
- Reflection and Refraction
Accessories include concave and convex lenses, prisms, mirrors and geometrical figures. They average 5 cm thick and 20 cm high, being highly visible for the whole class. All accessories are attached to the board using magnetic handles. This apparatus can be used to demonstrate index of refraction variations, total internal reflection, parallel deviation, prism behavior, etc.
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Air Cushion Table
Air Cushion Table is the ultimate teaching aid for demonstrating the structure and properties of gases, liquids, and solids; the process of electrical conduction; mechanical motions and even nuclear physics. Position the air cushion table on the overhead projector and watch colorful hovering bodies begin to move and collide. This dynamic presentation becomes a captivating visual experience sure to complement your instruction by making the complex concepts easy to comprehend and unforgettable for the students. Over 48 experiments can be performed using the 100+ components.
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Maxwell's Wheel
Used for demonstrating conservation of energy and angular momentum. This, unit which is basically a large fly wheel, is suspended by two strong chords. These chords are wound around the shaft of the wheel and then released. The wheel will unwind as it falls but will wind itself back up as the momentum carries the wheel upward in the opposite direction. This oscillation process will continue for several moments as the wheel slowly loses momentum and travels less each time.
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Cubical Magnet Model
Is used to demonstrate the behavior of molecular magnets in ferromagnetic materials; freely rotating magnetic needles that are mounted between two acrylic glass discs.
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Sun Runner Stirling Engine
The Sun Runner, a solar-powered Stirling Engine, offers a dramatic demonstration of energy conversion. This motor and its parabolic mirror can be attached to any conventional camera tripod. When properly aimed at the sun, the polished aluminum parabolic mirror focuses incoming solar energy on the heat cap of the engine, which is converted to rotary motion. This engine can also run as horizontal engine with alcohol burner.
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Density Cubes-Six Metals
Students identify each metal cube by determining its density. Each set includes one cube each: aluminum, brass, copper, iron, and zinc.
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Fluorescent Mineral Set
This is a sample of five different minerals, which fluoresces under ultraviolet light.
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Singing Pipe
This heavy, black iron pipe has a metal alloy screen fitted into one end. By heating the screen with a flame from a burner for about 10 seconds, the vertical pipe will produce a loud tone for as much as 30 seconds. The noise is produced because certain frequencies of sound from the turbulent flow of heated air resonate with the tube cavity. Turning the tube horizontally disrupts the flow of air and the sound stops. A matched pair will produce a clearly audible frequency.
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Sound Tubes
When spun in a circular motion, these tubes produce a tone. As the sound tubes are spun faster, the tone steps up in frequency.
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Wave Modeling Spring
This 6-foot long spring stretches to over 30 feet. Perfect for modeling standing and moving transverse waves as well as moving sound waves.
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Basic Boomwhacker Set
These eight-labeled tubes produce the C-Major Diatonic Scale.
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Galli Cat Demo
For years, many physics textbooks have grappled with the mystery of why cats always land on their feet. Finally, physics professor Ron Galli has solved the mystery, and has replicated a mechanical cat that always lands on its feet. This simple device, made from metal tubes and springs, demonstrates the conservation of angular momentum and the internal muscles of a cat.
Click here to download the video clip of this demonstration.
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Bottle Balancer
It is a fascinating conversation piece that illustrates the principle of center of gravity. A small hole in an oak board allows you to balance a 2-liter soda bottle at an angle that defies gravity.
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Neodymium Magnets
Neodymium is one of the most powerful magnet materials of the world and has high resistance to demagnetization.
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3-D Magnetic Field Demonstrator
This clear plastic case makes it possible to observe a magnetic field in 3-D.Each side of the field demonstrator contains iron filings, and the center of the demonstrator houses a powerful magnet. The demonstrator can open down the center, making it possible to view the magnetic field from all angles.
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Sand Pendulum
A bob is suspended from a straight bar linked to a cross bar. This simple mechanical arrangement has two degrees of freedom. When displaced from equilibrium and released or gently pushed it will trace Lissajou ellipses in the sand.
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Two-Circle Roller
Let two disks of same size intersect and have a diameter in common. Then If the distance of the two centers of disk is square root 2 times their radius, the distance from the center of gravity to floor is constant, thus the object rolls smoothly. This object is called the two-circle roller.
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3-D Standing Wave Machine
Standing waves are created by adjusting the speed of the two motors and the distance between them. In the dark, light from red, green and blue LEDs allows a full spectrum of color.
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Viscosity Tubes
Viscosity Tube set consists of five transparent plastic tubes containing oils of five different viscosities. A faster traveling chrome steel ball and a slower Teflon ball in each tube travel at constant speeds, which depend on the viscosity of the oil, the angle at which the tube is inclined and to some extent on the temperature
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Bubble Machine
Large wire frames and a special soap solution can be used to generate soap bubble standing waves large enough to be viewed by a lecture group. The rectangular frame is 10X24 in. and the circular frame is 11in. in diameter. Both are made from one-e
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Steel Sphere Density Kit
These two metal spheres have about the same mass, one has a diameter of 2.86cm and the other a diameter of 12.7cm, making their densities vastly different.
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Potential Well
The surface of this "potential well" is shaped as to produce an inverse square gravitational force. Giving a small ball a tangential velocity near the outer radius of the well,one can create elliptical orbits.
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Hover Craft
PASCO'S Hovercraft is designed to help students experience frictionless motion,thus better understand Newton's Laws. Its large platform provides enough area for the rider to comfortably sit while riding. The weight limit is 250 pounds.
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Magnetic Gun
Three identical spheres are situated on a 1-meter horizontal track. Roll another sphere slowly into the spheres at rest. The last sphere on the track off with tremendous velocity.
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Eddy Current Slide
This demonstrates the effects of eddy currrents as a magnet is rolled down various pltaes. These are 5 plates(copper,aluminum,brass,steel and plastic) are mounted on a plexi
construction with an adjustable stand.
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Magnetic Force Flash Light
Shaking this flashlight for 1 minute will produce 1-2 hours of light. It has two coils inside that can be easily seen by observers. Exhibits Lenz's laws principle.
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Jacob's Ladder
Two copper pipes mounted on a cart and connected to a neon sign transformer (15,000 volts/60ma). The spark starts at the bottom of the ladder, where the small spacing encourages elctrical breakdown. The discharge heats the air, which begins to rise. Because the discharge is a region of least electrical resistance, the spark continues along that path, which continues to rise. At the top of the ladder the discharge path becomes so long that its resistance is greater than the resistance of the shorter path at the bottom of the ladder.
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Curie Temperature Demo
When the magnet is heated to its curie temperature(using a propane torch) the paper clip that is attracted to it.
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Driving a Motor
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